SynQor MilQor Series 28Vin & 270Vin Hi-Rel DC-DC Converters

March 29, 2011
The MilQor® series of high-reliability DC-DC converters brings SynQor’s field proven high-efficiency synchronous rectifier technology to the Military/Avionics industry.
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The MilQor® series of high-reliability DC-DC converters brings SynQor’s field proven high-efficiency synchronous rectifier technology to the Military/Avionics industry. SynQor’s innovative QorSeal® packaging approach ensures survivability in the most hostile environments. Compatible with the industry standard format, these converters operate at a fixed frequency, have no opto-isolators, and follow conservative component derating guidelines.

Hi-Rel Product Features

  • Fixed switching frequency
  • No opto-isolators
  • Parallel operation with current share on MQFL
  • Remote sense
  • Clock synchronization
  • Primary referenced enable
  • Secondary referenced enable on MQFL
  • Continuous short circuit and overload protection with auto-restart feature
  • Input under-voltage and over-voltage shutdown
  • Output voltage trim range (MQHL, MQHR and MQBL) +10% to -10%
  • -55°C to +125°C Operating Temperature

Design Process

  • Hi-Rel series converters are:
  • Designed for reliability per NAVSO P-3641A guidelines
  • Designed with components derated per:
    • MIL-HDBK-1547A
    • NAVSO P-3641A

Qualification Process

  • Hi-Rel series converters are qualified to:
  • MIL-STD-810: consistent with RTCA/DO-160
  • SynQor’s First Article Qualification: consistent with MIL-STD-883
  • SynQor’s Long-Term Storage Survivability Qual.
  • SynQor’s on-going life test
  • SynQor’s element evaluation for HB and ES Grade

Specification Compliance

  • Hi-Rel series converters (with Hi-Rel filter) are designed to meet:
    • MIL-HDBK-704
    • RTCA/DO-160 Section 16, 17, 18
    • MIL-STD-1275
    • DEF-STAN 61-5 (Part 6)/(5, 6)
    • MIL-STD-461
    • RTCA/DO-160 Section 22

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